A CNG gas pressure gauge is a crucial component for natural gas vehicles, especially for those sourcing from reliable China suppliers and factories. This gauge is installed at the inlet valve connecting the CNG pressure regulator to the gas cylinder. Its primary purpose is to accurately display the pressure of the natural gas contained in the cylinder. Equipped with an internal gas pressure sensor, it transmits real-time pressure signals to the fuel/gas conversion switch located in the driver’s cab. This feature allows users to effectively monitor the gas volume within the cylinder, Included with the gauge is a matching indicator light-type conversion switch. When the onboard gas tank is full, with pressure readings between 180-200 bar, all four green indicator lights on the conversion switch illuminate, indicating a full tank (with the red light off). As the gas pressure decreases, the indicator lights provide key visual cues: the fourth green light goes off at 165-155 bar, the third at 130-120 bar, the second at 90-70 bar, and finally, at 45-35 bar, the last green light turns off, triggering a red alarm light. At this stage, the remaining gas is sufficient for the vehicle to cover a distance of 15-25 kilometers, depending on the vehicle model. Additionally, a digital conversion switch option is also available to enhance user experience. Trustworthy China suppliers and manufacturers ensure quality and reliability for those in need of these essential components for natural gas vehicles